Is the \(Y(2175)\) a Strangeonium Hybrid Meson?
Research
Abstract
QCD Gaussian sum-rules are used to explore the vector (\(J^{PC}=1^{−−}\)) strangeonium hybrid interpretation of the \(Y(2175)\). Using a two-resonance model consisting of the \(Y(2175)\) and an additional resonance, we find that the relative resonance strength of the \(Y(2175)\) in the Gaussian sum-rules is less than 5% that of a heavier 2.9 GeV state. This small relative strength presents a challenge to a dominantly-hybrid interpretation of the \(Y(2175)\).